海报 自定义海报（PHP GD 二维码 压缩图片）

海报 自定义海报（PHP GD 二维码 压缩图片）"/>

海报 自定义海报（PHP GD 二维码 压缩图片）

需求：生成海报（需要有二维码，相关文字）A , B , C, D 这四大个点的内容需要是变化的
D：一般是设计的二维码主方法：

//生成邀请卡
public function index()
{//接收参数$params=$this->input->post();//查询相关数据$result =  '';//时间$time = "海报时间";//获取http协议if(isset($_SERVER['HTTP_X_CLIENT_SCHEME'])){$scheme = $_SERVER['HTTP_X_CLIENT_SCHEME'] . '://';}elseif(isset($_SERVER['REQUEST_SCHEME'])){$scheme = $_SERVER['REQUEST_SCHEME'] . '://';}else{$scheme = 'http://';}//域名$domain =  $_SERVER['SERVER_NAME'] ;//二维码地址$url="";//获取水印生成图片$codeurl= $this->watermark($url,$params['live_id'],'',$params['bg_type']);//头像地址$codeparams['headimg'] = '';//背景图片（底图）$codeparams['background'] = '';//时间$codeparams['time'] = $time;//图片$codeparams['sponsor'] = '';//标题$codeparams['title'] = '';//表示id$codeparams['live_id'] = ;

    //缩略$this->pic($codeparams);//合成图片$pic = $this->compicture($codeurl,$codeparams,'show',$params['bg_type']);//返回参数if($pic){//返回值（url数据，展示输出）//获取http协议if(isset($_SERVER['HTTP_X_CLIENT_SCHEME'])){$scheme = $_SERVER['HTTP_X_CLIENT_SCHEME'] . '://';}elseif(isset($_SERVER['REQUEST_SCHEME'])){$scheme = $_SERVER['REQUEST_SCHEME'] . '://';}else{$scheme = 'http://';}//域名$domain =  $_SERVER['SERVER_NAME'] ;//获取其他参数$url = $scheme.$domain.$pic;$rebackdata['url'] = $url;ajaxReturn(['status'=>'0','msg'=>'成功','data'=>$rebackdata]);}else{ajaxReturn(['status'=>'1','msg'=>'失败','data'=>'']);}}/***********************************公共方法开始*********************************///生成缩略图public function pic($params){//创建文件夹$path_dir = "";if (!is_dir($path_dir)) {mkdir($path_dir, 0777, true);}//获取图片，生成缩略图$sponsorold = imagecreatefromstring(file_get_contents(ltrim($params['sponsor'],'/')));$sponsorxWidthold = imagesx($sponsorold);$sponsoryWidthold = imagesy($sponsorold);$new_width = $sponsorxWidthold*0.3;$new_height =$sponsoryWidthold*0.3;$this->imagepress($params['sponsor'], $new_width, $new_height,$params['live_id']);}//生成二维码function watermark($url, $live_id,$show,$type){//地址$bg_img_url = str_replace('\\', '/', strstr(__DIR__, 'app', true));//图片获取$bg_img = $bg_img_url . '相对地址';//背景图片获取到画布$img = imagecreatefromstring(file_get_contents($bg_img));//获取画布宽度（计算文字横向距离）$imgWidth = imagesx($img);$size = intval($imgWidth * 0.006);//清除缓存区ob_clean();//应用三方$this->load->library('Qrcode');//二维码内容$errorCorrectionLevel = 'L';//容错级别$matrixPointSize = $size;//生成图片大小//生成二维码图片$path_dir = "保存地址";if (!is_dir($path_dir)) {mkdir($path_dir, 0777, true);}//合成文件路径if($show){$filename = $path_dir.'/'.$live_id.'show'.'.png';}else{$filename = $path_dir.'/'.$live_id.'.png';}//删除旧文件if(file_exists($filename)){unlink($filename);}//重新生成文件if(!file_exists($filename)){QRcode::png($url,$filename , $errorCorrectionLevel, $matrixPointSize, 2);$QR = $filename;        //已经生成的原始二维码图片文件$QR = imagecreatefromstring(file_get_contents($QR));}//返回存储地址if($show){$rebackurl = '/存储相对路径/'.$live_id.'show'.'.png';}else{$rebackurl = '/存储相对路径/'.$live_id.'.png';}return $rebackurl;}//合成图片function compicture($codeurl,$params,$show,$bg_type=1){//背景图片(根据$bg_type的组合)$bg_img_url = str_replace('\\', '/', strstr(__DIR__, 'app', true));$bg_img = $bg_img_url . '相对地址';//字体路径$font_xk = $bg_img_url . 'static/font/msyhdb.TTF';//背景图片获取到画布$img = imagecreatefromstring(file_get_contents($bg_img));if($bg_type==6){$blacktitle = 45;//字体颜色 RGB 标题$black = 25;//字体颜色 RGB}else{$blacktitle = imagecolorallocate($img, 17,115,215);//字体颜色 RGB 标题$black = imagecolorallocate($img, 0,0,0);//字体颜色 RGB}//获取画布宽度（计算文字横向距离）$imgWidth = imagesx($img);//获取画布高度（计算文字竖向高度）$imgheight = imagesy($img);//字体大小（普通）$pubfontsize = $imgheight * 0.022;//计算间距$spacingsix = $imgheight * 0.0102;//背景$background = imagecreatefromstring(file_get_contents($params['background']));$backgroundWidth = imagesx($background);$backgroundx = ($imgWidth-$backgroundWidth)/1.9;$backgroundy = $imgheight*0.1;imagecopymerge($img, $background, $backgroundx, $backgroundy, 0,0, imagesx($background), imagesy($background), 100);//logo$headimg = imagecreatefromstring(file_get_contents($params['headimg']));$headimgWidth = imagesx($headimg);$headimgx = ($imgWidth-$headimgWidth)/1.9;$headimgy = $imgheight*0.1;imagecopymerge($img, $headimg, $headimgx, $headimgy, 0,0, imagesx($headimg), imagesy($headimg), 100);//渲染项目图片$sponsornew = 'upload/invitation_ugc/kv/7943.png';$sponsor = imagecreatefromstring(file_get_contents($sponsornew));$sponsorWidth = imagesx($sponsor);$sponsorx = ($imgWidth-$sponsorWidth)/2;$sponsory = $imgheight*0.35;imagecopymerge($img, $sponsor, $sponsorx, $sponsory, 0,0, imagesx($sponsor), imagesy($sponsor), 100);//二维码合并$image_2 = imagecreatefromstring(file_get_contents($codeurl));$img2Width = imagesx($image_2);$img2x = ($imgWidth-$img2Width)/1.96;$img2y = $imgheight*0.63;imagecopymerge($img, $image_2, $img2x, $img2y, 0,0, imagesx($image_2), imagesy($image_2), 100);//渲染标题(邀请你一起观看直播)$title = '邀请你一起观看直播';//获取文字宽度$titlex = ($imgWidth-$spacingsix*strlen($title))/1.96;//获取文字高度$titley = $imgheight*0.25;imagefttext($img, $pubfontsize, 0, $titlex, $titley, $blacktitle, $font_xk, $title);//渲染时间$time =$params['time'];//获取文字宽度$timex = ($imgWidth-$spacingsix*strlen($time))/1.85;$timey = $imgheight*0.3;$textsize =  $imgheight * 0.015;imagefttext($img, $textsize, 0, $timex, $timey, $black, $font_xk, $time);//渲染标题(需要分段：如果字符过长需要折中渲染)$title = $params['title'];//切分数据$chunkdata = $this->chunkstr($title,'10','12');//第一行数据if($chunkdata[0]){//获取文字高度$titley = $imgheight*0.56;imagefttext($img, $pubfontsize, 0, $sponsorx, $titley, $black, $font_xk, $chunkdata[0]);}//第二行数据if($chunkdata[1]){$titley = $imgheight*0.6;imagefttext($img, $pubfontsize, 0, $sponsorx, $titley, $black, $font_xk, $chunkdata[1]);}//渲染标题(长按识别二维码参加直播)$address ='长按识别二维码参加直播';//获取文字宽度$addressx = $imgWidth*0.33;$addressy = $imgheight*0.8;$addresssize =  $imgheight * 0.013;imagefttext($img, $addresssize, 0, $addressx, $addressy, $black, $font_xk, $address);//地址(图片合成后的保存地址)$path = $bg_img_url . '海报生成后保存地址';//创建文件if (!is_dir($path)) {mkdir($path, 0777, true);}//标志（正式区使用live_id）if($show){$manage_id = $params['live_id'].'show';}else{$manage_id = $params['live_id'];}//文件加上水印$upload = $path . '/' . $manage_id . '.jpg';//合成图片并保存imagejpeg($img, $upload);imagedestroy($img);//返回相对地址$returnurl = '相对路径'.$manage_id.'.jpg';return $returnurl;}//压缩图片public function imagepress($filepath, $new_width, $new_height,$live_id){//获取http协议if(isset($_SERVER['HTTP_X_CLIENT_SCHEME'])){$scheme = $_SERVER['HTTP_X_CLIENT_SCHEME'] . '://';}elseif(isset($_SERVER['REQUEST_SCHEME'])){$scheme = $_SERVER['REQUEST_SCHEME'] . '://';}else{$scheme = 'http://';}//域名$domain =  $_SERVER['SERVER_NAME'] ;//获取其他参数$filepath = $scheme.$domain.$filepath;$source_info   = getimagesize($filepath);$source_width  = $source_info[0];$source_height = $source_info[1];$source_mime   = $source_info['mime'];$source_ratio  = $source_height / $source_width;$target_ratio  = $new_height / $new_width;// 源图过高if ($source_ratio > $target_ratio){$cropped_width  = $source_width;$cropped_height = $source_width * $target_ratio;$source_x = 0;$source_y = ($source_height - $cropped_height) / 2;}// 源图过宽elseif ($source_ratio < $target_ratio){$cropped_width  = $source_height / $target_ratio;$cropped_height = $source_height;$source_x = ($source_width - $cropped_width) / 2;$source_y = 0;}// 源图适中else{$cropped_width  = $source_width;$cropped_height = $source_height;$source_x = 0;$source_y = 0;}switch ($source_mime){case 'image/gif':$source_image = imagecreatefromgif($filepath);break;case 'image/jpeg':$source_image = imagecreatefromjpeg($filepath);break;case 'image/png':$source_image = imagecreatefrompng($filepath);break;default:return false;break;}$target_image  = imagecreatetruecolor($new_width, $new_height);$cropped_image = imagecreatetruecolor($cropped_width, $cropped_height);// 裁剪imagecopy($cropped_image, $source_image, 0, 0, $source_x, $source_y, $cropped_width, $cropped_height);// 缩放imagecopyresampled($target_image, $cropped_image, 0, 0, 0, 0, $new_width, $new_height, $cropped_width, $cropped_height);header('Content-Type: image/jpeg');imagejpeg($target_image,'./upload/invitation_ugc/kv/'.$live_id.'.png');imagedestroy($source_image);imagedestroy($target_image);imagedestroy($cropped_image);}//切割长度（切割指定数据并且不能出现切割错误）public function chunkstr($string,$len,$lenmore){$start = 0;$strlen = mb_strlen($string);while ($strlen) {if(empty($array)){$array[] = mb_substr($string,$start,$len,"utf8");$string = mb_substr($string, $len, $strlen,"utf8");$strlen = mb_strlen($string);}else{$array[] = mb_substr($string,$start,$lenmore,"utf8");$string = mb_substr($string, $lenmore, $strlen,"utf8");$strlen = mb_strlen($string);}}return $array;}